You are bidding on a Western Electric types 22N thermocouple. It is in nice condition in a metal case. It has 4 pins in typical fashion of a four pin tube with side mounting pin. The pins have low grade gold for positive electrical contact. It tests with good continuity. In size, it measures roughly 1 3/8 inches in diameter, and 3 1/8 inches tall, not counting the pins. They should be useful for someone. Shipping weight is 8 ounces. Please see my other auctions for more interesting radio and audio items, and tubes.